import org.apache.spark.graphx.{Edge, Graph, VertexId}
import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}

/**
  * Created by danke on 2020/4/9.
  */
object reverseDemo {
  def main(args: Array[String]): Unit = {
    //设置运行环境
    val conf = new SparkConf().setAppName("SimpleGraphX").setMaster("local")
    val sc = new SparkContext(conf)
    sc.setLogLevel("WARN")

    //设置users顶点
    val users: RDD[(VertexId, (String, Int))] =
      sc.parallelize(Array((1L,("Alice", 28)),(2L,("Bob", 27)),(3L,("Charlie",65)), (4L, ("David",42)), (5L,("Ed",55)),(6L,("Fran",50))))

    //设置relationships边
    val relationships: RDD[Edge[Int]] =
      sc.parallelize(Array(Edge(2L, 1L, 7),Edge(2L, 4L, 2), Edge(3L, 2L, 4), Edge(3L, 6L, 3), Edge(4L, 1L, 1), Edge(5L, 2L, 2), Edge(5L, 3L, 8), Edge(5L, 6L, 3)))


    // Build the initial Graph

    val graph = Graph(users, relationships)
    graph.edges.collect.foreach(println(_))
    println("*******************************************************************")
    var graph2: Graph[(String, Int), Int] = graph.reverse
    graph2.edges.collect.foreach(println(_))
  }
}
